Speed-governor device



Jan. 13, 1931. 1,789, BY CHANGE OF NAME J. G. IILLINGS SPEED GOVERNOR DEVICE 2 Shuts-Sheet 1 BI'LSKY. Now

Filed Dec. 12. 1927 V J. BILSKY,- NOW BY CHANGE OF NAME J. G. BH-LINGS I SPEED GOVERNOR DEVICE v Filed Dec. .12. 1927 2 ShOQtl-SIIQQ. 2

Jacob Eds/g MM Jan. 13, 1931 noon ninet or 'cnrcaeo} rumors, now sr onmen ormmeonn eminent a a Y amines a srnnn-oovnanoannvron V ama m w en, send Io. 219381.}

This invention relatesto speed 7 verning devices for controlling the speed rotation of revolving. members. More particularly it relates to an apparatus including a main and t secondary source of power and speed responsiveineans for throwing into operation the secondary source-of power when a rotating member driven byf t he'primary source of wer falls belowia predetermined figure.

1o heinvention also contemplatesthe 'use of a second speed res onsive ni'eans forretard a in'g the speed of t edrivenfshaft-when the speed goes above a predeterm ned point, the

two sp ed vresponsii're mean th acting. t9 sha w en definiteflimit It is; therefore, an object of this inven-- tion'to providea s ed governor device comprising a pair-"o speed res onsive means mounted u on a commonfsha and ada ted to control t e'speed oi rotationof such 5 aft between definite and adjustable 1 It is a further object of this invention" to provide spteed .lresponsive means mounted npona1sha adapted to bedriven a primary source'of power, and to prov; e a seconda throw'n mby the o ration of sald speed responsive means w en'the speed of rotationofsaid shaft fallsibe'low a predeteb mined lower-limit, and'ito providead ustm ble means associated'with said speedresponsive means to throw insard secondary source elevational view'ot the same, showing operation, H 7 7 V Figure 3fis anenlarged detail view. I "Fi re 4 is a sectionalview taken on hne "an auxiliary power to the lnain' driving -means,, it is here illustrated in connection is connected to said'shaftl imeanso f; e)

f pawls 10,

' gear 8 from the collar 9, are adapted to source offpjower adapted to be vrnain motor 4 an the: seconda niotor 5-is V 1dle, 1tw1ll be apparent that e of ower. I, J L y Sther and furthermportant o b ects o f this 2 invention "will become ap arent' from the following description an appendedwheel "11,- and thus drive illustrated in the drmvvings,v

"Figure 5' is an enlarged Jcrbss' sectional" view of theoperating switch. Figure 16- is an enlar d sectional; view/j igure 1. 1 While my" inventionis, applicable ingen eral tothe'control'of the speed of'anyre-I volving shaftfor other member provided with a" main drivingineans and a secondary driving meansadapted to be thrown infas with electric motors as the mainand second ary driving means. A main shaft 1 iscon nected through a coupling 2 "to thfshaft 3 of a main motor 4. A secondary motorfi spur gear 6"mounted upon e secondary motorfs haft 7 and ada ted to mesh-"witha gear 8 loosely mounte fupon thesha'ft 11 A collar 9 secured to said shaft 1 *prevents to" the gear 8 from sliding .upon the shaftIin' onedirectiom A' pair offspring m (F1%..'6) flpiVQt8nyjmOl111t0 upon. ears forme on theopposite face of the I gage with thejteeth of a ratchet wheel 11 secured "to said shaft.

-When"the shaft 1 is being-"rotated bythe V 5 will merely slide over the teeth a the ratchet wheel" 11'. However since the motor 5 is geared'to drive the shaft 1 at a higherrate q of; speed than the motor 4 when said motor 5 is running, the ear 8 will cause the pawls, 10to engage wit the teeth of the ratchet I the shaft 1 at in increased rate of speed. :1 h I I Aspeed responsive meanspindicated as";

whole by the reference numeral 12, is

'inounted upon said shaft lto control the,

operation of the secondary motor 35) speed res onsive means 12 comprises a pair of space collars 13 and 14, said; collar 14 being secured to the shaft 1','as by aset screw 15, and the other collar 13. being .slidable' upon said shaft.' Pail-sot pivotallyconnetedlinks 16 and 17 connect said collars 13 and 14 and carry weights 18 and 19, re-" spectively; pivoted atthe respective joints" s the revolving weights 18 and 19*tofly outwardly by reathemthe collars18 and\14-tend"to tlra s 'throu b said said ever 87 at any desired setting. Ob-

formed'between the; members of said of links. A Y 7 between collarsd18 and]: xpandmg' orce ten ing-to p mi h f 6 and 1 parallel to the. slllftflg ls shown When, w.

shaft 1 is such as to cause e 1 in Figure the son-0f the centrifugal force acting toget I r and compress the spring 20, as

shown in Figure 1. I

The collar 18, which is slidably mounted j the shaft 1, is pivotally connected 1aw;

v a oke 71 to an arm 21, pivoted as at22toa racket arm 28. Said arm 21 is provided with a lower extended end 24- adapted to actuate a Y-shaped switch lever 25. Said switch lever 25, as best shown in Figures 1 and 5, controls the secondary motor circuit comprised of wires 26, 27 and 28.

Said wires 27 and 28 are connected to interminals 28'and 80, r tively positioned, withip a, switch box 1. Said switch lever is pivoted at its lower end upon a pin 82 also positioned in said switch box 81.! A make and break arm 83 pivoted as t 34 and carrying an insulated contact strip 72 is connected by means of a re- 7 silient cu'rve'd band 35 to said switch lever 25 in such a manner that operation of the switch lever. 25 serves to actuate the make and break arm 33 to close and open the gap between the terminals 29 and30. A etc 86 limits thebackward throw of the eandbreak arm88. I

Meansfor controlling the speed at which the speed res nsive means becomes operative to throw in the second motor 5 comprises an angular lever 87 pivoted as at 38 .sp holes 77 and the pointer arm 42 with a hole 78 to ermit a pin 44 to be passed holes when in register to hold viousl the quadrant 41 may be so calibrate as to indicate directly for any setting of the pointer arm 42 the speed of rotation of the shaftfil, at which the s responsive means .12 operative to throw in the motor 5. It'willthus be apparent that when the speed responsive means 12 is set to operate at any definite speed of the shaft 1, if, by

virtue of an overload ontheshaft 1, the

' 13sec" coiled spring20 A means-will o bracket 50. Said arm 46 is a drops below; the pre' spcnsiv e 'means is set sai .s responsive rate t 'ro'ughthe arm 21 to trip the lever 25nd close-the circuit m of the motor 4 of" formed by thewireaSI and 28 "in the sec ondarymotor The motor 5 will accordinglybestarted up, and acting through --the 'g'ears 6 and 8 and the pawls 10 and ratchet wheel 11 will apply power to the shaft 1 to b the speed of said shaft 1 again tothe p etermined As soon as the point is in reached, the speed responsive means 12%; the arm 21 in-the opposite direction to tri the lever 25 back to open the switch and ut of! the motor 5. a a

A second speed responsive means is also mounted upon the shaft 1 for the pur of a pyling a braking force to said em 1 w en its speed of rotation goes above an upper set limit. Said speed responsive means 45 is in eneral similar in construc tion to the s cc res nsive means 12. In the case of t e spee responsive means 45, however, it is ineffective at speeds lower than those for which-it is set to operate. The free end of'saidmeans 45 is ivotally connected to a yoke 75 formed on t e upper end of a rockin arm 46, said arm bei in turn connected y means of a ,sprin 4% 'to an angular lever 48 pivoted as at 9 to a ivoted at its upper end to a slidable collar 1 of the speed responsive means 45 and at its lower end is pivotally mounted as at 52 upon a stand 58. Accordingly, the spring 47 acts 'nst the centrifugal I force ten ing to t row the weights-of the speed responsive means 45 outwardl As before, the tension upon the spring 4. may be controlled by angular adjustment of the lever 48 with respect to a aduated 'uadrant 54.

aid slidab e collar 51 is also connected to a hollow box'55, enclosin a rtion of said shaft 1. A sleeve 56 p vo as at 57 to the upper end. of said bracket arm is adapted to enclose said shaft '1 and to extend wit 'n said box 55. Said sleeve 56 is provided at'its enclosedend with an enlar ed head 58, between which and a-friction p ate 59 is mounted a compression spring 60. Said friction late 59, which is secured to the end of the ox 55, bears a net a second friction disk 76. A third friction disk 79 is interposed between the end of the s ring 60 and the enlarged head 58. When, erefore, the speed responsive means 45, due to the speed of rotation ofthe shaft 1, operates to move over the arm 46 against the tension of the spring 47, the revolving box is similarly moved to compress the spring and set up friction between the friction plates 59 and 76, and the friction disk 79 and head 58, thus acting as a brake toretard the speed of rotation-of said shiftl.

It will thus be apparent that by suitable adjustment of the angular levers 37 and 48 with respect to their aduated quadrants 41 and 54, the speed c the rotating shaft 1 may be controlled within narrow limits. If the speed of said shaft 1 falls below the lower limit set, as indicated upon the quadrant 41, the speed responsive means 12 operates to close the circuit of the secondary motor 5, and throw said motor 5 into 0 erative relation to the shaft 1 and thereby ring the speed of the shaft 1 again within the prescribed limits. On the other hand, if the speed of the rotating shaft 1 exceeds the upper limit set on the quadrant 54, the speed responsive means 45 is rendered effective to exert a retarding force upon the rotating shaft 1 by virtue ofthe breaking action set up between the friction disks 59 and 76 and the disk 79 and head 58. There is thus provided automatic means for controlling the speed of a rotating shaft, or otherrotating member, to obtain practically constant speed. Such a device as above described finds application in any cases where it is desired to control the speed of rotation of a shaft within narrow limits. It will also be apparent that the speed responsive means 12 may be used alone to throw in an auxiliary source of power when the speed of a rotating shaft falls below a lower prescribed limit. This would enable the use of a main motor'having a low starting torque, in which case the secondary motor would automatically throw in when the main motor was started up to bring the line shaft up to speed and then would automaticall cut out.

I am. aware that many 0 anges may be made and numerous details of construction may be varied through a wide range without departing from the principles of this invention, and I, therefore, do not ropose limiting the patent granted hereon ot erwise than necessitated by the prior art.

I claim as my invention:

the shaft, switch means responsive to the speed of the shaft to energize the auxili motor, means in operative association wit the shaft and the auxiliary motor responsive to the speed of the motor to connect it to the shaft to assist the main motor during periods of abnormally heavy load torque on the shaft and to automatically disconnect the auxiliary motor when the shaft speed increases above a predetermined limit following a decrease in the load torque on the shaft, and means res onsive to an increase in the speed of the s aft to apply a brake load to the shaft.

3. In combination, a revoluble shaft for connection to a driven load, a main electric motor connected to the shaft, an auxiliary electric motor normally disconnected from the shaft, switch means to energize the auxiliary motor, clutch means, mcludin a toothed member and a normally trai in pawl in operative association with the sha and the auxiliary motor arranged to connect the energized auxiliary motor tothe shaft to assist the main motor during periods of abnormally heavy load torque on the shaft and to automatically prevent the drivin of the auxiliary motor by the main motor, w en the speed of the shaft increases beyond a predetermined limit.

In testimony whereof I have hereunto subscribed my name at Chicago, Cook County,

Illinois.

JACOB BILSKY.

1. In combination, a revoluble shaft for connection to a driven load, a main electric motor connected to the shaft, an auxiliary electric motor normally disconnected from the shaft, switch means responsive to the speed of the shaft to energize the auxiliary motor, means in operative association with the shaft and the auxiliary motor responsive to the speed of the auxiliary motor to connect it to the shaft to assist themain motor during periods of abnormally heavy load torque on the shaft and to automatically disconnect the auxiliary motor when the shaft speed increases beyond a predetermined limit following a decrease in the load torque on thesha y 2. In combination, a revoluble shaft for connection to a driven load, a main electric motor connected to the shaft, an auxiliary electric motor normally disconnected from 

